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Chris Metcalf867e3592010-05-28 23:09:12 -04001# For a description of the syntax of this configuration file,
Chris Metcalf5fb682b2011-02-28 15:58:39 -05002# see Documentation/kbuild/kconfig-language.txt.
Chris Metcalf867e3592010-05-28 23:09:12 -04003
Thomas Gleixner8df274062011-01-19 20:44:43 +01004config TILE
5 def_bool y
Chris Metcalf41bb38f2012-06-15 15:23:06 -04006 select HAVE_DMA_ATTRS
7 select HAVE_DMA_API_DEBUG
Thomas Gleixner8df274062011-01-19 20:44:43 +01008 select HAVE_KVM if !TILEGX
9 select GENERIC_FIND_FIRST_BIT
Thomas Gleixner8df274062011-01-19 20:44:43 +010010 select USE_GENERIC_SMP_HELPERS
11 select CC_OPTIMIZE_FOR_SIZE
12 select HAVE_GENERIC_HARDIRQS
13 select GENERIC_IRQ_PROBE
14 select GENERIC_PENDING_IRQ if SMP
Thomas Gleixner61a16742011-03-25 14:21:17 +000015 select GENERIC_IRQ_SHOW
Chris Metcalfe6d96682012-05-18 13:33:24 -040016 select HAVE_SYSCALL_WRAPPERS if TILEGX
Chris Metcalff133ecc2011-05-26 12:40:09 -040017 select SYS_HYPERVISOR
Chris Metcalf8d695142012-03-27 13:47:57 -040018 select ARCH_HAVE_NMI_SAFE_CMPXCHG
Anna-Maria Gleixner4ec008d2012-05-18 16:45:54 +000019 select GENERIC_CLOCKEVENTS
Thomas Gleixner8df274062011-01-19 20:44:43 +010020
21# FIXME: investigate whether we need/want these options.
22# select HAVE_IOREMAP_PROT
Chris Metcalf5fb682b2011-02-28 15:58:39 -050023# select HAVE_OPTPROBES
24# select HAVE_REGS_AND_STACK_ACCESS_API
25# select HAVE_HW_BREAKPOINT
26# select PERF_EVENTS
27# select HAVE_USER_RETURN_NOTIFIER
28# config NO_BOOTMEM
29# config ARCH_SUPPORTS_DEBUG_PAGEALLOC
30# config HUGETLB_PAGE_SIZE_VARIABLE
Thomas Gleixner8df274062011-01-19 20:44:43 +010031
Chris Metcalf867e3592010-05-28 23:09:12 -040032config MMU
33 def_bool y
34
35config GENERIC_CSUM
36 def_bool y
37
Chris Metcalf867e3592010-05-28 23:09:12 -040038config SEMAPHORE_SLEEPERS
39 def_bool y
40
41config HAVE_ARCH_ALLOC_REMAP
42 def_bool y
43
44config HAVE_SETUP_PER_CPU_AREA
45 def_bool y
46
47config NEED_PER_CPU_PAGE_FIRST_CHUNK
Chris Metcalf5fb682b2011-02-28 15:58:39 -050048 def_bool y
Chris Metcalf867e3592010-05-28 23:09:12 -040049
50config SYS_SUPPORTS_HUGETLBFS
51 def_bool y
52
Chris Metcalf621b1952012-04-01 14:04:21 -040053# Support for additional huge page sizes besides HPAGE_SIZE.
54# The software support is currently only present in the TILE-Gx
55# hypervisor. TILEPro in any case does not support page sizes
56# larger than the default HPAGE_SIZE.
57config HUGETLB_SUPER_PAGES
58 depends on HUGETLB_PAGE && TILEGX
59 def_bool y
60
Lucas De Marchi25985ed2011-03-30 22:57:33 -030061# FIXME: tilegx can implement a more efficient rwsem.
Chris Metcalf867e3592010-05-28 23:09:12 -040062config RWSEM_GENERIC_SPINLOCK
63 def_bool y
64
65# We have a very flat architecture from a migration point of view,
66# so save boot time by presetting this (particularly useful on tile-sim).
67config DEFAULT_MIGRATION_COST
68 int
69 default "10000000"
70
71# We only support gcc 4.4 and above, so this should work.
72config ARCH_SUPPORTS_OPTIMIZED_INLINING
73 def_bool y
74
75config ARCH_PHYS_ADDR_T_64BIT
76 def_bool y
77
FUJITA Tomonorid31eb512010-10-27 15:32:58 -070078config ARCH_DMA_ADDR_T_64BIT
79 def_bool y
80
Chris Metcalf3d1e8a82012-03-27 13:53:30 -040081config NEED_DMA_MAP_STATE
82 def_bool y
83
Chris Metcalf41bb38f2012-06-15 15:23:06 -040084config ARCH_HAS_DMA_SET_COHERENT_MASK
85 bool
86
Chris Metcalf867e3592010-05-28 23:09:12 -040087config LOCKDEP_SUPPORT
88 def_bool y
89
90config STACKTRACE_SUPPORT
91 def_bool y
92 select STACKTRACE
93
94# We use discontigmem for now; at some point we may want to switch
95# to sparsemem (Tilera bug 7996).
96config ARCH_DISCONTIGMEM_ENABLE
97 def_bool y
98
99config ARCH_DISCONTIGMEM_DEFAULT
100 def_bool y
101
102config TRACE_IRQFLAGS_SUPPORT
103 def_bool y
104
105config STRICT_DEVMEM
106 def_bool y
107
108# SMP is required for Tilera Linux.
109config SMP
110 def_bool y
111
112# Allow checking for compile-time determined overflow errors in
113# copy_from_user(). There are still unprovable places in the
114# generic code as of 2.6.34, so this option is not really compatible
115# with -Werror, which is more useful in general.
116config DEBUG_COPY_FROM_USER
117 def_bool n
118
119config HVC_TILE
120 select HVC_DRIVER
121 def_bool y
122
Chris Metcalf867e3592010-05-28 23:09:12 -0400123config TILEGX
Chris Metcalf867e3592010-05-28 23:09:12 -0400124 bool "Building with TILE-Gx (64-bit) compiler and toolchain"
125
Chris Metcalfacd1a192012-04-07 15:58:24 -0400126config TILEPRO
127 def_bool !TILEGX
128
Chris Metcalf867e3592010-05-28 23:09:12 -0400129config 64BIT
Chris Metcalfacd1a192012-04-07 15:58:24 -0400130 def_bool TILEGX
Chris Metcalf867e3592010-05-28 23:09:12 -0400131
132config ARCH_DEFCONFIG
133 string
Chris Metcalf3d1e8a82012-03-27 13:53:30 -0400134 default "arch/tile/configs/tilepro_defconfig" if !TILEGX
Chris Metcalf867e3592010-05-28 23:09:12 -0400135 default "arch/tile/configs/tilegx_defconfig" if TILEGX
136
137source "init/Kconfig"
138
139menu "Tilera-specific configuration"
140
141config NR_CPUS
142 int "Maximum number of tiles (2-255)"
143 range 2 255
144 depends on SMP
145 default "64"
146 ---help---
147 Building with 64 is the recommended value, but a slightly
148 smaller kernel memory footprint results from using a smaller
149 value on chips with fewer tiles.
150
Chris Metcalfd5d14ed2012-03-29 13:58:43 -0400151if TILEGX
152
153choice
154 prompt "Kernel page size"
155 default PAGE_SIZE_64KB
156 help
157 This lets you select the page size of the kernel. For best
158 performance on memory-intensive applications, a page size of 64KB
159 is recommended. For workloads involving many small files, many
160 connections, etc., it may be better to select 16KB, which uses
161 memory more efficiently at some cost in TLB performance.
162
163 Note that this option is TILE-Gx specific; currently
164 TILEPro page size is set by rebuilding the hypervisor.
165
166config PAGE_SIZE_16KB
167 bool "16KB"
168
169config PAGE_SIZE_64KB
170 bool "64KB"
171
172endchoice
173
174endif
175
Chris Metcalf867e3592010-05-28 23:09:12 -0400176source "kernel/Kconfig.hz"
177
178config KEXEC
179 bool "kexec system call"
180 ---help---
181 kexec is a system call that implements the ability to shutdown your
182 current kernel, and to start another kernel. It is like a reboot
183 but it is independent of the system firmware. It is used
184 to implement the "mboot" Tilera booter.
185
186 The name comes from the similarity to the exec system call.
187
188config COMPAT
189 bool "Support 32-bit TILE-Gx binaries in addition to 64-bit"
190 depends on TILEGX
191 select COMPAT_BINFMT_ELF
192 default y
193 ---help---
194 If enabled, the kernel will support running TILE-Gx binaries
195 that were built with the -m32 option.
196
197config SYSVIPC_COMPAT
198 def_bool y
199 depends on COMPAT && SYSVIPC
200
201# We do not currently support disabling HIGHMEM on tile64 and tilepro.
202config HIGHMEM
203 bool # "Support for more than 512 MB of RAM"
204 default !TILEGX
205 ---help---
206 Linux can use the full amount of RAM in the system by
207 default. However, the address space of TILE processors is
208 only 4 Gigabytes large. That means that, if you have a large
209 amount of physical memory, not all of it can be "permanently
210 mapped" by the kernel. The physical memory that's not
211 permanently mapped is called "high memory".
212
213 If you are compiling a kernel which will never run on a
214 machine with more than 512 MB total physical RAM, answer
215 "false" here. This will result in the kernel mapping all of
216 physical memory into the top 1 GB of virtual memory space.
217
218 If unsure, say "true".
219
Chris Metcalfeef015c2012-05-09 12:26:30 -0400220config ZONE_DMA
221 def_bool y
222
Chris Metcalf41bb38f2012-06-15 15:23:06 -0400223config IOMMU_HELPER
224 bool
225
226config NEED_SG_DMA_LENGTH
227 bool
228
229config SWIOTLB
230 bool
231 default TILEGX
232 select IOMMU_HELPER
233 select NEED_SG_DMA_LENGTH
234 select ARCH_HAS_DMA_SET_COHERENT_MASK
235
Chris Metcalf867e3592010-05-28 23:09:12 -0400236# We do not currently support disabling NUMA.
237config NUMA
238 bool # "NUMA Memory Allocation and Scheduler Support"
239 depends on SMP && DISCONTIGMEM
240 default y
241 ---help---
242 NUMA memory allocation is required for TILE processors
243 unless booting with memory striping enabled in the
244 hypervisor, or with only a single memory controller.
245 It is recommended that this option always be enabled.
246
247config NODES_SHIFT
248 int "Log base 2 of the max number of memory controllers"
249 default 2
250 depends on NEED_MULTIPLE_NODES
251 ---help---
252 By default, 2, i.e. 2^2 == 4 DDR2 controllers.
253 In a system with more controllers, this value should be raised.
254
Chris Metcalf867e3592010-05-28 23:09:12 -0400255choice
256 depends on !TILEGX
David Rientjes6a108a12011-01-20 14:44:16 -0800257 prompt "Memory split" if EXPERT
Chris Metcalf867e3592010-05-28 23:09:12 -0400258 default VMSPLIT_3G
259 ---help---
260 Select the desired split between kernel and user memory.
261
262 If the address range available to the kernel is less than the
263 physical memory installed, the remaining memory will be available
264 as "high memory". Accessing high memory is a little more costly
265 than low memory, as it needs to be mapped into the kernel first.
266 Note that increasing the kernel address space limits the range
267 available to user programs, making the address space there
268 tighter. Selecting anything other than the default 3G/1G split
269 will also likely make your kernel incompatible with binary-only
270 kernel modules.
271
272 If you are not absolutely sure what you are doing, leave this
273 option alone!
274
Chris Metcalf55928402010-09-13 08:50:09 -0400275 config VMSPLIT_3_75G
Chris Metcalf867e3592010-05-28 23:09:12 -0400276 bool "3.75G/0.25G user/kernel split (no kernel networking)"
Chris Metcalf55928402010-09-13 08:50:09 -0400277 config VMSPLIT_3_5G
Chris Metcalf867e3592010-05-28 23:09:12 -0400278 bool "3.5G/0.5G user/kernel split"
279 config VMSPLIT_3G
280 bool "3G/1G user/kernel split"
Chris Metcalf09c17ea2011-02-28 16:01:09 -0500281 config VMSPLIT_2_75G
282 bool "2.75G/1.25G user/kernel split (for full 1G low memory)"
283 config VMSPLIT_2_5G
284 bool "2.5G/1.5G user/kernel split"
285 config VMSPLIT_2_25G
286 bool "2.25G/1.75G user/kernel split"
Chris Metcalf867e3592010-05-28 23:09:12 -0400287 config VMSPLIT_2G
288 bool "2G/2G user/kernel split"
289 config VMSPLIT_1G
290 bool "1G/3G user/kernel split"
291endchoice
292
293config PAGE_OFFSET
294 hex
Chris Metcalf884197f2012-03-27 13:56:04 -0400295 depends on !64BIT
Chris Metcalf55928402010-09-13 08:50:09 -0400296 default 0xF0000000 if VMSPLIT_3_75G
297 default 0xE0000000 if VMSPLIT_3_5G
Chris Metcalf09c17ea2011-02-28 16:01:09 -0500298 default 0xB0000000 if VMSPLIT_2_75G
299 default 0xA0000000 if VMSPLIT_2_5G
300 default 0x90000000 if VMSPLIT_2_25G
Chris Metcalf867e3592010-05-28 23:09:12 -0400301 default 0x80000000 if VMSPLIT_2G
302 default 0x40000000 if VMSPLIT_1G
303 default 0xC0000000
304
305source "mm/Kconfig"
306
307config CMDLINE_BOOL
308 bool "Built-in kernel command line"
309 default n
310 ---help---
311 Allow for specifying boot arguments to the kernel at
312 build time. On some systems (e.g. embedded ones), it is
313 necessary or convenient to provide some or all of the
314 kernel boot arguments with the kernel itself (that is,
315 to not rely on the boot loader to provide them.)
316
317 To compile command line arguments into the kernel,
318 set this option to 'Y', then fill in the
319 the boot arguments in CONFIG_CMDLINE.
320
321 Systems with fully functional boot loaders (e.g. mboot, or
322 if booting over PCI) should leave this option set to 'N'.
323
324config CMDLINE
325 string "Built-in kernel command string"
326 depends on CMDLINE_BOOL
327 default ""
328 ---help---
329 Enter arguments here that should be compiled into the kernel
330 image and used at boot time. If the boot loader provides a
331 command line at boot time, it is appended to this string to
332 form the full kernel command line, when the system boots.
333
334 However, you can use the CONFIG_CMDLINE_OVERRIDE option to
335 change this behavior.
336
337 In most cases, the command line (whether built-in or provided
338 by the boot loader) should specify the device for the root
339 file system.
340
341config CMDLINE_OVERRIDE
342 bool "Built-in command line overrides boot loader arguments"
343 default n
344 depends on CMDLINE_BOOL
345 ---help---
346 Set this option to 'Y' to have the kernel ignore the boot loader
347 command line, and use ONLY the built-in command line.
348
349 This is used to work around broken boot loaders. This should
350 be set to 'N' under normal conditions.
351
352config VMALLOC_RESERVE
353 hex
354 default 0x1000000
355
Chris Metcalf9f9c0382010-06-25 17:00:56 -0400356config HARDWALL
357 bool "Hardwall support to allow access to user dynamic network"
358 default y
359
Chris Metcalfa78c9422010-10-14 16:23:03 -0400360config KERNEL_PL
361 int "Processor protection level for kernel"
362 range 1 2
363 default "1"
364 ---help---
365 This setting determines the processor protection level the
366 kernel will be built to run at. Generally you should use
367 the default value here.
368
Chris Metcalf37b82b52012-04-04 16:39:58 -0400369source "arch/tile/gxio/Kconfig"
370
Chris Metcalf867e3592010-05-28 23:09:12 -0400371endmenu # Tilera-specific configuration
372
373menu "Bus options"
374
Chris Metcalff02cbbe2010-11-02 12:05:10 -0400375config PCI
376 bool "PCI support"
377 default y
378 select PCI_DOMAINS
Michael S. Tsirkin84550122011-11-29 20:42:56 +0200379 select GENERIC_PCI_IOMAP
Chris Metcalf12962262012-04-07 17:10:17 -0400380 select TILE_GXIO_TRIO if TILEGX
381 select ARCH_SUPPORTS_MSI if TILEGX
382 select PCI_MSI if TILEGX
Chris Metcalff02cbbe2010-11-02 12:05:10 -0400383 ---help---
384 Enable PCI root complex support, so PCIe endpoint devices can
385 be attached to the Tile chip. Many, but not all, PCI devices
386 are supported under Tilera's root complex driver.
387
388config PCI_DOMAINS
389 bool
390
Chris Metcalf867e3592010-05-28 23:09:12 -0400391config NO_IOMEM
392 def_bool !PCI
393
394config NO_IOPORT
395 def_bool !PCI
396
397source "drivers/pci/Kconfig"
398
Chris Metcalf47fc28b2012-05-09 13:58:14 -0400399config TILE_USB
400 tristate "Tilera USB host adapter support"
401 default y
402 depends on USB
403 depends on TILEGX
404 select TILE_GXIO_USB_HOST
405 ---help---
406 Provides USB host adapter support for the built-in EHCI and OHCI
407 interfaces on TILE-Gx chips.
408
Chris Metcalff1006252012-06-16 16:41:05 -0400409# USB OHCI needs the bounce pool since tilegx will often have more
410# than 4GB of memory, but we don't currently use the IOTLB to present
411# a 32-bit address to OHCI. So we need to use a bounce pool instead.
412config NEED_BOUNCE_POOL
413 def_bool USB_OHCI_HCD
414
Chris Metcalf398fa5a2011-05-02 15:09:42 -0400415config HOTPLUG
416 bool "Support for hot-pluggable devices"
417 ---help---
418 Say Y here if you want to plug devices into your computer while
419 the system is running, and be able to use them quickly. In many
420 cases, the devices can likewise be unplugged at any time too.
421 One well-known example of this is USB.
422
Chris Metcalf867e3592010-05-28 23:09:12 -0400423source "drivers/pci/hotplug/Kconfig"
424
425endmenu
426
427menu "Executable file formats"
428
429# only elf supported
430config KCORE_ELF
431 def_bool y
432 depends on PROC_FS
433
434source "fs/Kconfig.binfmt"
435
436endmenu
437
438source "net/Kconfig"
439
440source "drivers/Kconfig"
441
442source "fs/Kconfig"
443
444source "arch/tile/Kconfig.debug"
445
446source "security/Kconfig"
447
448source "crypto/Kconfig"
449
450source "lib/Kconfig"
Chris Metcalfa78c9422010-10-14 16:23:03 -0400451
452source "arch/tile/kvm/Kconfig"